A Measurement of the Psi' to J/psi Production Ratio in 920 GeV Proton-Nucleus Interactions

Abstract

Ratios of the Psi' over the J/psi production cross sections in the dilepton channel for C, Ti and W targets have been measured in 920 GeV proton-nucleus interactions with the HERA-B detector at the HERA storage ring. The Psi' and J/psi states were reconstructed in both the mu+mu- and the e+e- decay modes. The measurements covered the kinematic range -0.35 < x_F < 0.1 with transverse momentum p_T < 4.5 GeV/c. The Psi' to J/psi production ratio is almost constant in the covered x_F range and shows a slow increase with p_T. The angular dependence of the ratio has been used to measure the difference of the Psi' and J/psi polarization. All results for the muon and electron decay channels are in good agreement: their ratio, averaged over all events, is R_psi'(mu)/R_psi'(e)=1.00+-0.08+-0.04. This result constitutes a new, direct experimental constraint on the double ratio of branching fractions, (B'(mu)*B(e))/(B(mu)*B'(e)), of Psi' and J/psi in the two channels.

20 pages, 9 figures

References in corpus (18)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Rigorous QCD Analysis of Inclusive Annihilation and Production of Heavy Quarkonium
• Measurement of Differences Between J/Psi and Psi' Suppression in p-A Collisions
• Measurement of J/Psi and Psi(2S) Polarization in ppbar Collisions at sqrt(s) = 1.8 TeV
• Quarkonium production in hadronic collisions
• Polarization of Prompt J/psi at the Tevatron
• Hadro-production of Quarkonia in Fixed Target Experiments
• Charmonium Composition and Nuclear Suppression
• Inelastic photoproduction of polarised $J/\psi$
• The $x_F$ Dependence of $\psi$ and Drell-Yan Production
• Analysis of charmonium production at fixed-target experiments in the NRQCD approach
• Are the $J/\psi$ and ${\chi }_{c}A$ Dependencies the Same?
• The Outer Tracker Detector of the HERA-B Experiment Part I: Detector
• J/Psi Polarization in 800-GeV p-Cu Interactions
• Production of J/psi Mesons in p Be Collisions at 530 and 800 GeV/c
• The Outer Tracker Detector of the HERA-B Experiment. Part II: Front-End Electronics
• Design and Operation of Front-End Electronics for the HERA-B Muon Detector
• Bremsstrahlung in Leptonic Onia Decays: Effects on Mass Spectra

Cited by in corpus (28)

• Decoding the phase structure of QCD via particle production at high energy
• Charmonium and bottomonium production in heavy-ion collisions
• Nuclear modification of psi^prime, chi_c and J/psi production in d+Au collisions at sqrt(s_NN) = 200 GeV
• Measurement of J/psi and psi(2S) prompt double-differential cross sections in pp collisions at sqrt(s) = 7 TeV
• Kinematic distributions and nuclear effects of $J/\psi$ production in 920 GeV fixed-target proton-nucleus collisions
• Suppression of $\psi$(2S) production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Study of psi' and chi_c decays as feed-down sources of J/psi hadro-production
• Production of the Charmonium States chic_1 and chic_2 in Proton Nucleus Interactions at sqrt{s} = 41.6 GeV
• Centrality dependence of $\psi$(2S) suppression in p-Pb collisions at $\sqrt{{\text{s}}_{\mathrm{NN}}}$ = 5.02 TeV
• Study of $\psi (2S)$ production and cold nuclear matter effects in pPb collisions at $\sqrt{s_{NN}}=5\mathrm{TeV}$
• Measurement of the relative yields of $\psi (2S)$ to $\psi (1S)$ mesons produced at forward and backward rapidity in $p$$+$$p$, $p$$+$Al, $p$$+$Au, and ${}^3$He$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Angular distributions of leptons from J/psi's produced in 920 GeV fixed-target proton-nucleus collisions
• Measurement of D^0, D^+, D_s^+ and D^{*+} Production in Fixed Target 920 GeV Proton-Nucleus Collisions
• Quarkonia measurement in p+p and d+Au collisions at sqrt(s)=200 GeV by PHENIX Detector
• Measurements of the transverse-momentum-dependent cross sections of $J/\psi$ production at mid-rapidity in proton+proton collisions at $\sqrt{s}=$ 510 and 500 GeV with the STAR detector
• Measurement of jpsi production in p+p collisions at \sqrts = 500 GeV at STAR experiment
• Nuclear effects on J/ψ production in proton-nucleus collisions
• Inclusive Psi(2S) production in p-Pb collisions with ALICE
• Calibration of the mirror system in the HERA-B RICH
• NRQCD analysis of charmonium production with pion and proton beams at fixed-target energies
• Fixed-target charmonium production and pion parton distributions
• From prompt to direct J/$\psi$ production: new insights on the ${\chi }_{c1}$ and ${\chi }_{c2}$ polarizations and feed-down contributions from a global-fit analysis of mid-rapidity LHC data
• Measurements of charmonium production in p$+$p, p$+$Au, and Au$+$Au collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}$~=~200~GeV with the STAR experiment
• Cold nuclear effects on heavy flavours (a review)
• Pion PDFs confronted by Fixed-Target Charmonium Production
• Heavy-Flavor Measurements by the PHENIX Experiment at RHIC
• Psi prime to J/psi Ratio Measurements in PHENIX at RHIC
• The study of gluon energy loss in cold nuclear matter from $J/\psi$ production